The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 01, 2017
Filed:
Aug. 09, 2012
Ravinath Kausik Kadayam Viswanathan, Boston, MA (US);
Chanh Cao Minh, Katy, TX (US);
Ridvan Akkurt, Lexington, MA (US);
Baarinadh Vissapragada, Walpole, MA (US);
Yi-qiao Song, Newton Center, MA (US);
Lukasz Zielinski, Cambridge, GB;
Ravinath Kausik Kadayam Viswanathan, Boston, MA (US);
Chanh Cao Minh, Katy, TX (US);
Ridvan Akkurt, Lexington, MA (US);
Baarinadh Vissapragada, Walpole, MA (US);
Yi-Qiao Song, Newton Center, MA (US);
Lukasz Zielinski, Cambridge, GB;
SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US);
Abstract
Apparatus and methods for characterizing hydrocarbons in a subterranean formation include obtaining a sample of the subterranean formation; measuring, uphole, the porosity of the sample; using a nuclear magnetic resonance (NMR) tool downhole in the borehole, sending NMR pulse sequences configured for formation pore size and measuring NMR signals that characterize the formation at a location in the formation; analyzing the signals to find a gas porosity of the formation at the location; and determining a hydrogen index (HI) of the subterranean formation from the gas porosity and from the porosity of the sample. The obtained HImay then be used in conjunction with downhole NMR measurements to find corrected gas porosities at locations of the formation.